Excellent guide!! I also do the starting method just like you (using +4 and up cards, using up +3 cards during good stages, stop when I'm at 2 or lower), except that I usually start in the middle. Maybe I should try the left to right method. But however it works.
I would also like to add, tho' this is common sense:
If a monster drops any cards, pick it up and save it. Hoarding cards will build up over time until you get a nice bundle to Card ID off. ;] Plus selling off comp stones and drills that you don't need is a nice added bonus. XD